Measurement of ovulation rates by laparoscopy and effects on
reproductive performance
R.W. Kelly and A.J. Allison
Invermay Agricultural Research Centre, Mosgiel
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Proceedings of the New Zealand Society of Animal Production. 1976, 36: 240-246
In 1974 and 1975, 40 and 50 ewes, respectively, from each of six
flocks of approximately 100 mixed-age ewes (Romney, Coopworth and
Perendale) were laparoscoped 3 to 12 days after mating. In addition, 10
ewes drawn from each flock were repeatedly laparoscoped in 1974 and
early 1975 (mean number of operations per ewe = 20), and then mated in
1975 and their reproductive performance recorded. The single laparoscopy
at mating had no effect on returns to service, percentage of ewes
failing to lamb, or the percentage of ewes with single, twin or triplet
lambs in the flocks. The ewes that were repeatedly laparoscoped had more
returns to service than those which had only one examination (26% v.
5.4%), but there were no other significant differences in their
reproductive performance.
Keywords: NZSAPAB;
Last Updated 24-08-2000
